These functions analyse bipartitions found in a series of trees.
\code{prop.part} counts the number of bipartitions found in a series
- of trees given as \code{\dots}.
+ of trees given as \code{\dots}. If a single tree is passed, the
+ returned object is a list of vectors with the tips descending from
+ each node (i.e., clade compositions indexed by node number).
\code{prop.clades} counts the number of times the bipartitions present
in \code{phy} are present in a series of trees given as \code{\dots} or